[TheForge] OT -12v motors

[peter fels]

Better add a particle filter too...Thems heavy particles that tend to stay in your lungs.
I didn't bother for too many years and am paying for it now.

On Jun 20, 2011, at 12:15 PM, CraigSchaefer wrote:

> 
> 
> always wear a buffing and grinding helmet. 
> 
> 
> 
> 
> 
> CraigS 
> Gresham, OR 
> ----- Original Message ----- 
> From: "peter fels" <artgawk at thegrid.net> 
> To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net> 
> Sent: Monday, June 20, 2011 12:12:52 PM 
> Subject: Re: [TheForge] OT -12v motors 
> 
> I see a lot of folks using an unshielded buffing wheel or wire brush, and it's threatening...especially in larger wheels! 
> A minimum, easily added safety measure, 
> is a stout, adjustable, back bar, that blocks ( hopefully) loose objects snagged in the wheel , 
> from coming full circle and embedding in your face. 
> It's not really adequate, but it's quick and better than nothing. 
> 
> On Jun 20, 2011, at 11:55 AM, Andrew Vida wrote: 
> 
>> On 6/20/2011 8:22 AM, Grover.Richardson at gtri.gatech.edu wrote: 
>>> The question is how much HP does a normal 110 V motor have, the one 
>> used on the buffing wheel that you wish to replicate.  Find a dc motor 
>> of equivalent horsepower and you will have a pretty much equivalent 
>> grinder.  The dc motor will have different characteristics under load 
>> (shunt or series fed (bunches of gobbledegook that is not that important 
>> to someone who just wants to use it<G>), but overall should provide you 
>> with a pleasurable tool. 
>>> 
>> 
>> My small buffer, 1800 rpm, is 1/2 hp.  It will hurt you if you do not 
>> show the proper care, but my 3600 rpm 3/4 hp is monster enough to kill 
>> you fast and ugly.  You don't need more power for anything of moderate 
>> size.    Those large spindle, high hp industrial buffers such as the 
>> ones GE made ages ago have their places, but  only for substantially 
>> larger work.  I'd call 1/2 hp good for most tasks.  A lower spindle 
>> speed is definitely desirable from both the safety standpoint as well as 
>> that of not cutting your surfaces.  3600 rpm motors will allow you to 
>> cut very deeply into your work far faster than many people would 
>> initially think possible.  The difference between 1800 and 3600 is 
>> remarkable. 
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